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Networking and Web Services in Silverlight

CL06. Networking and Web Services in Silverlight. Yavor Georgiev Program Manager Microsoft Corporation. Getting Data Into Silverlight. Message Pattern. Interaction Model. Resource centric. Multicast. Duplex. Operation centric. Request/reply.

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Networking and Web Services in Silverlight

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  1. CL06 Networking and Web Services in Silverlight YavorGeorgiev Program Manager Microsoft Corporation

  2. Getting Data Into Silverlight Message Pattern Interaction Model Resourcecentric Multicast Duplex Operationcentric Request/reply

  3. Data Access Examples • “Forms over data” E2E business app • Access data from third-party REST service • Access your database or SharePoint data model using REST • App which accesses server business logic • Chat app • Streamed data (video, stock prices) inside an intranet

  4. Resource-Centric Apps Message Pattern Interaction Model • “Forms over data” E2E business app Resourcecentric Multicast Duplex Operationcentric Request/reply

  5. WCF RIA ServicesSystem.Web.DomainServices • “Forms over data” E2E business app • Prescriptive model for CRUD services • Great tooling to maximize productivity • E2E data: sorting, paging, filtering, validation… • RIA Services now built on top of WCF • Productivity of RIA Services • Power and flexibility of WCF • To learn more tomorrow: • CL21 @ 11:30AM - Building Amazing Business Applications with Silverlight and .NET RIA Services • CL07 @ 1:45PM - Mastering .NET RIA Services

  6. Resource-Centric Apps Message Pattern Interaction Model Resourcecentric Multicast Duplex WCF RIA Services Operationcentric Request/reply

  7. Travel Agent App demo

  8. Resource-Centric Apps Message Pattern Interaction Model • Access data from third-party REST service • Access your database or SharePoint data model using REST Resourcecentric Multicast Duplex Operationcentric Request/reply

  9. Accessing Public REST ServicesSystem.Net • ClientHttp networking stack • Integrated with the OS networking stack • Supports common BrowserHttp stack features for consistent experience • Better RESTful protocol support for same and cross-domain scenarios • All HTTP verbs supported • Response bodies available for all HTTP status codes • Authentication & cookies support

  10. ClientHttp Stack Features

  11. Travel Agent App demo Accessing Public REST Services

  12. Access a Data Model Using RESTSystem.Data.Services • WCF Data Services • Formerly ADO.NET Data Services • Services with a RESTful interface and a set of conventions designed for easy data sharing • What is Data Services? • Server framework for .NET, others coming • Clients for Silverlight, .NET, PHP, Java, AJAX • SharePoint 2010 uses a Data Service to expose data

  13. Data Services Client • Accessing Data Services • Silverlight ClientHttp stack still an option • Data Services client more usable as it knows the details of the data service interface • Features • Full abstraction on top of the service – no need to deal with HTTP, serialization, etc • Data as objects with automatic change tracking • LINQ for queries • Data-binding friendly interfaces • Work same-domain and cross-domain

  14. Travel Agent App demo Accessing SharePoint Using aData Service

  15. Aside: Windows Communication Foundation Programming Model Core Services Web HTTP Services Data Services RIA Services Workflow Services Service Model Data Contract Service Contract Service Behavior Channel Model Formats (Atom, JSON, XML,…) Transports (HTTP, TCP, …) Protocols (SOAP, HTTP, OData)

  16. Resource-Centric Apps Message Pattern Interaction Model Resourcecentric Multicast Duplex System.Net WCF Data Services Operationcentric Request/reply • Access data from third-party REST service • Access your database or SharePoint data model using REST

  17. Operation-Centric Apps Message Pattern Interaction Model • App which accesses server business logic • Chat app • Streamed data (video, stock prices) inside an intranet Resourcecentric Multicast Duplex Operationcentric Request/reply

  18. Operation-Centric Apps with WCFSystem.ServiceModel • Accessing server business logic • Generated proxies (Add Service Reference) • Serialization of objects on the wire, faults • High-performance encoders • Different security approaches • Chat scenario • High-level messaging patterns built on top of networking APIs

  19. Binary Message EncoderServer throughput increase 24% 71%

  20. Binary Message EncoderMessage size reduction

  21. WCF Features • Faults enabled • System.ServiceModel.CommunicationException was unhandled by user codeMessage="The remote server returned an error: NotFound." • To get full exceptions, use ClientHttp stack • Security in cross-domain scenarios enabled • Normally use browser-managed security (generally not safe for cross-domain use) • Transport security with message credentials in cross-domain scenarios

  22. Duplex Messaging (Server Push) • Server push is compelling when server has to notify client of events (email server) • Internet: PollingDuplex (HTTP-based) • [Post SL4 Beta] response chunking for better performance • [Post SL4 Beta] can scale across machines (web farms, Windows Azure) – Invensys case study • Intranet: NetTcp (TCP sockets-based) • Also works for request/reply services • Both offer the same programming model – just a matter of changing the binding

  23. Duplex Messaging Scalability Intel Xeon 2 cores@3.6GHz, 2GB RAMWindows Server 2008 32-bit, IIS7

  24. Travel Agent App demo Implementing Chat Using Duplex Messaging

  25. Multicast MessagingSystem.Net • UDP multicast is a technique for one-to-many communication over an IP infrastructure • Scenarios • Market data streaming • Video and media streaming • Real-time communication • Device and service discovery

  26. UDP Multicast Details • Scales to a large receiver population • Two key shapes for multicast groups: • Single Source Multicast (one-to-many)System.Net.Sockets.UdpSingleSourceMulticastClient • Any Source Multicast (many-to-many)System.Net.Sockets.UdpAnySourceMulticastClient • Need to expose a policy responder (just like sockets and HTTP) • [Post SL4 Beta] Going away for both sockets and multicast if app is elevated

  27. Operation-Centric Apps Message Pattern Interaction Model • App which accesses server business logic • Chat app • Streamed data (video, stock prices) inside an intranet Resourcecentric Multicast Duplex System.Net Operationcentric Request/reply WCF System.Net

  28. Data Access Examples • “Forms over data” E2E business app • WCF RIA Services (System.Web.DomainServices ) • Access data from third-party REST service • System.Net • Access your database or SharePoint data model using REST • WCF Data Services (System.Data.Services) • App which accesses server business logic • WCF (System.ServiceModel) • Chat app • WCF (System.ServiceModel) • Streamed data (video, stock prices) inside an intranet • System.Net

  29. Additional Resources • Blogs: • http://blogs.msdn.com/astoriateam • http://blogs.msdn.com/matos • http://blogs.msdn.com/ncl • http://blogs.msdn.com/silverlightws(will have sample code from today) • E-mail: yavorg@microsoft.com

  30. Related Sessions • Today • FT12 - ADO.NET Data Services: What’s New with the RESTful Data Services Framework • FT55 - Developing REST Applications with the .NET Framework • SVC31 - Lessons Learned: Building On-Premises and Cloud Applications with the Service Bus and Windows Azure • Tomorrow • CL21 @ 11:30AM - Building Amazing Business Applications with Silverlight and.NET RIA Services • CL07 @ 1:45PM - Mastering .NET RIA Services • PR12 @ 1:45PM - It's All about the Services: Developing Custom Applications for SharePoint Server 2010 Using ASP.NET, WCF, and REST

  31. YOUR FEEDBACK IS IMPORTANT TO US! Please fill out session evaluation forms online at MicrosoftPDC.com

  32. Learn More On Channel 9 • Expand your PDC experience through Channel 9 • Explore videos, hands-on labs, sample code and demos through the new Channel 9 training courses channel9.msdn.com/learn Built by Developers for Developers….

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